diff --git a/tox.ini b/tox.ini
index df3e6dde..68a0bfa3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -58,6 +58,14 @@ commands = {[extra]commands}
 deps = {[extra]deps}
 commands = {[extra]commands}
 
+[testenv:py34]
+# py34-compatible pandas
+deps =
+    {[extra]deps}
+    cython
+    numpy
+    pandas<0.21
+
 [testenv:py37]
 deps = {[extra]deps}
 commands = {[extra]commands}